Research On Intelligent Control Strategy In Gas Collecting Process Of Coke Ovens

Coke is the main raw material in the metallurgical industry for iron-smelting.In the coking process,large amount of by-product gas will be generated from coke ovens.Gas gathering process by effectively recycling shortage of gas is an important link in the iron and steel production,which not only saves energy but also reduces environmental pollution.The gas-collector pressure of coke ovens is an important parameter in the coking production,and its stability directly affects the quality of coke and gas,the life-time of ovens as well as the producing environment.Therefore,it is significant for the iron and steel enterprise to study on the control of gas collecting process of coke ovens.The gas collecting process of coke ovens is a very complex industrial process.Its characteristics of multivariable,nonlinearity,strong coupling,and large disturbance are the major difficulties in the control of gas collecting process.Most traditional control methods only consider regulating butterfly valve,ignoring the effect that blower suction to stabilize the gas collector pressure.So consider the butterfly value and blowers as a whole.By adjusting blower to futher improve the control performance of gas collector pressure system.Based on the gas collecting process of coke ovens in Shenyang,this thesis has mainly studied the mechanism modeling method and the expert control system based on Black Hole Spectral Clustering used in the gas-collector pressure control under comprehensive consideration on the physical features and technological characteristics of the gas-collector pressure system for coke ovens.Firstly,this thesis gives the research situation of gas-collector pressure system for coke ovens at home and abroad,and analyzes the physical properties and the process characteristics of the gas-collector pressure system for coke ovens.On this basis,this thesis builds the dynamic mathematical model of the gas-collector pressure system for coke ovens by using the mechanism modeling method,and on the model of gas collector pressure system characteristics test,test model is correct.Secondly,this paper based on the original PID control circuit of the gas collector pressure system.Designed a expert control system based on the BH-SC algorithm.In order to achieve the blower part of coke oven gas collector pressure system control.Finally,in the Matlab environment,build a simulation model of gas collector pressure control system to test control algorithms.Simulation results show that this method can not only satisfy gas collector pressure range of technological requirements,but also to ensure the butterfly valve opening degree in a reasonable range,and has a certain anti-interference performance,good control,proved the effectiveness of this method.